Why is there an alternate missed approach fix
and holding pattern for this approach?
You may be directed to intercept the arc anywhere along its path, but typically you're cleared to an initial approach fix
along the arc, then to follow the arc for the approach.
According to the Terminal Instrument Procedures (TERPS) manual, initial approach fix
altitudes must provide 1000 feet of clearance within 4 miles of course and 500 feet of clearance for an additional 2 miles beyond the inner ring.
Once I'd oozed into position 15 feet from my final approach fix
, I still had to study the water for several minutes before acquiring a target.
This will be achieved by enabling aircraft to join the arrival sequence earlier and manage their speed better to arrive at their initial approach fix
at the optimum time for their destination airport in the London terminal manoeuvring area (TMA).
The crew declared an in-flight emergency with Air Traffic Control, coordinated to adjust gross weight by 20,000 pounds of fuel, and entered holding at Offutt AFB's Initial Approach Fix
to discuss landing and go-around considerations.
"ADF required" usually indicates that an ADF is required to fly a transition to an initial approach fix
(IAF) or to fly the missed approach.
My likely initial heading would mean that HANCE intersection, both an initial approach fix
(IAF) and the final approach fix
(FAF) would not be far away.
We took it upon ourselves to politely notify ATC that we were "procedure turn in-bound, level 32 hundred feet." ATC, to their credit, had us "execute an immediate right 360" while the oncoming airliner was directed to "maintain five thousand feet until the final approach fix
." The threat of collision was avoided before it fully materialized.
If the approach type downgrades past the final approach fix
, a "NO GP" message is annunciated.
We broke out of the weather just prior to the final approach fix
. In retrospect, this math does not compute.